/usr/src/linux-headers-3.13.0-24/security/yama/Makefile is in linux-headers-3.13.0-24 3.13.0-24.47.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | obj-$(CONFIG_SECURITY_YAMA) := yama.o
yama-y := yama_lsm.o
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